Metal panel for forming envelopes subjected to high temperatures



Nov. 29, 1960 G. ROSS! METAL PANEL FOR FORMING ENVELOPES SUBJECTED TO HIGH TEMPERATURES Filed July 20, 1954 IN VEN TOR.

GIOVANNI R0567 q f 2,962,131 Patented Nov. 29, 1960 METAL PANEL FOR FORMING ENVELOPES SUBJECTED TO HIGH TEMPERATURES The present invention relates to a metal panel for forming envelopes subjected to high temperatures.

In technical work it is often required to be able to enclose a space wherein high temperatures are developed to provide for a better utilization of them and prevent heat dispersion without having recourse to cumbersome masonry or cooled walls.

In the first case thefollowing are the disadvantages met with: encumbrance, weight, rigidity under the pressures developed by gas explosions, permeability to gas and water, cost and limited resistance to heat dispersions, which, though being small per unit of area, become important when extended to the large surface of the masonry constituting the envelope.

In the second case, and more particularly for steam boilers, about one half of the evaporating tubes area is sacrificed to form an inner insulation supporting wall.

The endeavors made to build metal walls able to directly withstand temperatures of GOO-650 and even 700 C. have given very bad results, especially on account of the deformations resulting even after only a few hours working and becoming worse should the temperature be subject to large variations, up to the point of rendering the envelope useless after a few days work.

Nor has the problem been solved practically by the use of ashlar or skirted walls which absorb a greater amount of heat, due to their irregular and increased surface.

The present invention obviates these defects and is substantially characterized by the fact of comprising at least one metal plate in which variously oriented slots are formed, such as to interrupt the uniformity of the surface and prevent the transmission of the deformations and elongations due to temperature variations along said surface.

The invention will be described with reference to the annexed schematic drawing, description and drawing being given only as an indicative example, non-limiting the range of the invention.

Fig. l is a part elevation of a panel according to the invention;

Fig. 2 is a cross section of the above;

Figs. 3 and 4 show in cross section two variants of the connections of the elements forming the panel;

Fig. 5 is a side elevation of a connecting device for the elements constituting the panel;

Fig. 6 is a front elevation of two elements approached prior to their reciprocal connection;

Figs. 7 and 8 show, respectively in cross section and front elevation another constructional variant of the connection of two panel elements.

Fig. 9 is the front elevation of a metal sheet panel with a protective covering for the slots.

Referring now to Figs. 1 and 2, the panel intended to constitute the envelope is formed by several quadrangular shaped elements A set close to each other along their sides so as to realize a practically continuous wall.

Each element is formed by a front metal plate 1, quadrangular in shape, provided with slots 2 which can be variously shaped and oriented. In the upper left hand element the slots 2 are in part set at an angle with the direction of the plate sides and in part rectilinear or cross-shaped according to the diagonals, or, as indicated below, can also be arc-shaped with the arc center at the center of figure of the plate. In the right hand upper element the'slots are parallel to the plate sides whereas in the lower left hand element they are crossed according to the diagonals, or star-shaped.

The lower right hand element presents cross slots in the direction of the diagonals.

Each plate 1 is held by guides 3 presented by the front borders of a parallelepipedal box-like element 4 also made from metal sheet and intended to realize, in combination with the front plate 1 exposed to the heat, a

chamber 5 filled with a heat insulating material. Plate .1, not being rigidly connected to the box-like element 4,

to the bottom of the box-like element 4 by means of auxiliary metal plates 6 welded to both parts. The reciprocal connection plates of the borders can be constituted, as in the illustrated example, by a structural channel shape 6 realizing the complete covering of the slots, but still consenting the thermic expansions of the slot borders. The rear connection of the various elements A to each other along the contacting sides can be effected in various ways, for instance, by means of sleeves 7 fastened to the two parts and having their common axis parallel to the axis of the side which they are connected to. Into sleeves 7 connecting pins 8 are inserted. The connection can also be effected by riveting as shown at 9 in Fig. 2. The seal between the various elements A is effected by a packing 10 (for instance of asbestos) along and between the near sides, kept in place by a curved strip 11.

Packing 10' (as shown in Fig. 3 in which parts corresponding to described ones are distinguished by the same reference with an apex) is pressed into a little channel 12 with which one of elements A is provided. In Fig. 4 (wherein like parts to those of Figs. 1 and 2 are distinguished by the same reference marks provided with two apices) packing 10" is pressed in between the sides of the two elements A adjacent and a longitudinal back strip 13 is provided, covering the joint between the two elements, A". Said strip as shown by Fig. 5 is preferably provided with pins 14 intended to insert themselves into the sleeves 8" of the two elements in order to effect their reciprocal connection.

In Figs. 7 and 8 (wherein organs corresponding to those of Figs. 1 and 2 are distinguished by the same reference marks provided with three apices), the two elements A are in contact and packing 15 is pressed in between their back surface and a longitudinal strip 16 covering the joint, provided with connecting pins along its opposite borders and parallelly to the same. Pin 17 does not cooperate axially but parallelly to sleeves 8" fixed to the two elements A'.

The slots in the metal plate can be provided, in order to realize a sealing efiect, with joint covering metal strips 18 as shown in Fig. 9, said strips being connected to the base plate 1 by means of welding along but one of theirperipheral borders, so as not to interfere in any mannerwith the deformation and heat expansion of plate 1.

In practice the constructional particulars of the panel.

may be varied without for this reason quitting the ambit of the invention and therefore the realm of the Letters.

Patent.

I claim: 1. A metal panel for fabricating envelopes subjected:

to high temperatures, comprising at least one metal plate having open slots therein to interrupt the continuity of the surface of said plate and prevent the transmission along the surface of deformation due to heat variations and metal bands covering the slots and connected with the plate solely along one of their peripheral sides, so as to avoid interfering with deformation and expansion due to heat.

2. A panel according to claim 1 further comprising a box-like sheet metal element filled with heat non-conducting material and having guide means loosely holding the peripheral edges of said plate.

3. A panel according to claim 2 comprising at least two box-like elements joined to each other along one side.

4. A panel according to claim 3 further comprising a packing between the joined sides of said box-like elements.

5. A .panel according to claim 3 comprising a pin and sleeve connection between adjacent panels forming a composite assembly.

6. A panel according to claim 5 wherein the pins are aligned as a joint covering along the connection side of two adjacent panels.

7. A heat resistant element comprising a shallow box having opposing faces one of which is closed and the other of which is open, guides positioned on said box adjacent the open face, and a metal sheet accommodated in said guides for closing said box, said sheet defining open slots opening into said box, said slots compensating for thermal expansion of said sheet.

8. An element as claimed in claim 7 comprising an insulating filling in said box.

9. An element as claimed in claim 7 comprising support members supporting the peripheries of the slots on the closed face.

10. An element as claimed in claim 7 comprising means onsaid box for attaching the same to a like box for the formation of a wall.

11. An element as claimed in claim 10 comprising an insulating packing supported against and by both of said boxes.

References Cited in the file of this patent UNITED STATES PATENTS 21,938 Buchanan Nov. 2, 1858 1,774,150 Murray Aug. 26, 1930 2,209,580 Sargent July 30, 1940 2,209,816 Grapp July 30, 1940 2,228,363 Pinney Jan. 14, 1941 2,476,229 Tobin July 12, 1949 2,736,400 Gay et al Feb. 28, 1956 FOREIGN PATENTS 793,334 France of 1935 

